// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_WINDOW_MOVE_CLIENT_H_
#define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_WINDOW_MOVE_CLIENT_H_

#include <X11/Xlib.h>

#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/message_loop/message_loop.h"
#include "ui/gfx/geometry/point.h"
#include "ui/views/views_export.h"
#include "ui/views/widget/desktop_aura/x11_move_loop_delegate.h"
#include "ui/views/widget/desktop_aura/x11_whole_screen_move_loop.h"
#include "ui/wm/public/window_move_client.h"

namespace aura {
class WindowTreeHost;
}

namespace views {

// When we're dragging tabs, we need to manually position our window.
class VIEWS_EXPORT X11DesktopWindowMoveClient : public views::X11MoveLoopDelegate,
                                                public aura::client::WindowMoveClient {
public:
    X11DesktopWindowMoveClient();
    ~X11DesktopWindowMoveClient() override;

    // Overridden from X11WholeScreenMoveLoopDelegate:
    void OnMouseMovement(const gfx::Point& screen_point,
        int flags,
        base::TimeDelta event_time) override;
    void OnMouseReleased() override;
    void OnMoveLoopEnded() override;

    // Overridden from aura::client::WindowMoveClient:
    aura::client::WindowMoveResult RunMoveLoop(
        aura::Window* window,
        const gfx::Vector2d& drag_offset,
        aura::client::WindowMoveSource move_source) override;
    void EndMoveLoop() override;

private:
    X11WholeScreenMoveLoop move_loop_;

    // We need to keep track of this so we can actually move it when reacting to
    // mouse events.
    aura::WindowTreeHost* host_;

    // Our cursor offset from the top left window origin when the drag
    // started. Used to calculate the window's new bounds relative to the current
    // location of the cursor.
    gfx::Vector2d window_offset_;
};

} // namespace views

#endif // UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_WINDOW_MOVE_CLIENT_H_
